V-shaped clamping block and rotor angle gauge

Abstract

A V-shaped clamping block and a rotor angle gauge comprise the V-shaped clamping block formed by assembling a front clamping body and a rear clamping body, the front clamping body is provided with a first inclined face abutting against the upper surface of a rotor, the rear clamping body is provided with a second inclined face abutting against the lower surface of the rotor, and a vertical gap between the first inclined face and the second inclined face forms a V-shaped clamping cavity. The clamping angle of the V-shaped clamping cavity is a non-round angle, and an opening of the V-shaped clamping cavity faces the side face a. The non-fillet workpiece is divided into the front clamp body with the first inclined plane and the rear clamp body with the second inclined plane, the technical threshold of the machining link is greatly reduced, the V-shaped clamping block can be obtained after the front clamp body and the rear clamp body which are machined and formed through CNC are assembled, and the production cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of metering equipment, especially a V-shaped clamping block and a rotor angle instrument. BACKGROUND

[0002] The pitch angle of the rotor blade on the remote control helicopter can be measured by the rotor angle instrument, and the blade section adopts the design of the rounded front edge and the sharp rear edge, so the rear edge of the blade needs to be clamped by the V-shaped plastic clamping block during measurement, such as the pitch gauge disclosed in CN208887551U and CN208833175U. If the V-shaped plastic clamping block is formed by injection molding, high mold manufacturing cost is generated, which is not suitable for small batch production. The inner corner of the CNC processing is mostly rounded, and it needs complicated process to directly form an oblique angle (non-rounded angle) on the same workpiece, so a V-shaped clamping block that can be produced and assembled at low cost is needed. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving the prior art problems and provides a V-shaped clamping block and a rotor angle instrument.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a V-shaped clamping block, which comprises a V-shaped clamping block formed by assembling a front clamping body and a rear clamping body, a first inclined surface on the front clamping body abutting against the upper surface of the rotor, a second inclined surface on the rear clamping body abutting against the lower surface of the rotor, a vertical gap between the first inclined surface and the second inclined surface forming a V-shaped clamping cavity, the clamping angle of the V-shaped clamping cavity being a non-rounded angle, and the opening of the V-shaped clamping cavity facing the side surface a.

[0005] Preferably, the front clamping body and the rear clamping body are respectively provided with a front opening groove and a rear opening groove in communication, the front opening groove and the rear opening groove are partially overlapped in the sectional orthographic projection, and the overlapping area forms the V-shaped clamping cavity; the openings of the front opening groove and the rear opening groove both face the side surface a, and the corners of the front opening groove and the rear opening groove are rounded.

[0006] Preferably, the first inclined surface is located on the upper groove edge of the front opening groove, the second inclined surface is located on the lower groove edge of the rear opening groove, the sectional orthographic projection of the front opening groove comprises the overlapping area and a lower non-overlapping area, the lower groove edge of the rear opening groove extends horizontally forward to form a lower embedding block, and the lower embedding block is embedded and matched with the lower non-overlapping area; the sectional orthographic projection of the rear opening groove comprises an upper filling area and the overlapping area, the upper groove edge of the front opening groove extends horizontally backward to form an upper embedding block, and the upper embedding block is embedded and matched with the upper filling area.

[0007] Preferably, the back surface of the front clamping body is provided with a positioning groove, and the rear clamping body is provided with a positioning block embedded and matched with the positioning groove.

[0008] Preferably, the front clamping body and the rear clamping body are fixed by screwing, the front clamping body is provided with a positioning hole, the rear clamping body is provided with a positioning through hole opposite to the positioning hole, and a positioning bolt is screwed and connected through the positioning through hole and the positioning hole.

[0009] A rotor angle gauge includes the V-shaped clamp.

[0010] Preferably, it also includes a positioning frame with a digital angle meter fixed on it. The positioning frame is provided with a sliding hole, and a V-shaped clamping block is slidably connected in the sliding hole. One end of the sliding hole is provided with a positioning angle, and the included angle of the positioning angle is rounded. The opening of the V-shaped clamping cavity is set towards the positioning angle. The sliding trajectory of the V-shaped clamping block is parallel to the measuring surface of the digital angle meter.

[0011] Preferably, the bottom surface of the positioning frame is provided with two calibration planes located on the same horizontal plane, and the calibration planes are parallel to the measuring surface of the digital display angle meter; the bottom surface of the positioning frame is also provided with a positioning opening groove with the opening facing downward, the bottom wall of the positioning opening groove is higher than the horizontal plane where the calibration planes are located, and the positioning opening groove is located between the two calibration planes.

[0012] The beneficial effects of this utility model are: by splitting a non-rounded corner workpiece into a front clamping body with a first inclined surface and a rear clamping body with a second inclined surface, the technical threshold of the processing is greatly reduced. The front clamping body and the rear clamping body, which are formed by CNC machining, can be assembled to obtain a V-shaped clamping block, which effectively reduces the production cost and is more suitable for small-batch production. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the V-shaped clamping block structure of this utility model;

[0014] Figure 2 This is a front view of the front clamp of this utility model;

[0015] Figure 3 This is a schematic diagram of the front clamp of this utility model;

[0016] Figure 4 This is a front view of the rear clamp of this utility model (the side opposite to the front clamp);

[0017] Figure 5 This is a schematic diagram of the structure of the rear clamp of this utility model;

[0018] Figure 6 This is a schematic diagram showing the operating state of the rotor angle meter of this utility model;

[0019] Figure 7 This is a front view of the rotor angle meter of this utility model;

[0020] Figure 8 This is a schematic diagram of the rotor angle meter of this utility model (back side). Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In conjunction with the embodiments and appendices Figures 1-8 A V-shaped clamping block includes a V-shaped clamping block formed by assembling a front clamping body 1 and a rear clamping body 2. The front clamping body 1 is provided with a first inclined surface 10 that abuts against the upper surface of the rotor, and the rear clamping body 2 is provided with a second inclined surface 20 that abuts against the lower surface of the rotor. The vertical gap between the first inclined surface 10 and the second inclined surface 20 forms a V-shaped clamping cavity 3. The clamping angle of the V-shaped clamping cavity 3 is non-rounded, and the opening of the V-shaped clamping cavity faces the side a.

[0023] The front clamp 1 and the rear clamp 2 are respectively provided with a connected front opening groove and a rear opening groove. The cross-sectional orthographic projections of the front opening groove and the rear opening groove overlap, and the overlapping area forms a V-shaped clamping cavity. The openings of the front opening groove and the rear opening groove both face the side a, and the corners of the front opening groove and the rear opening groove are both rounded.

[0024] Furthermore, the front opening groove includes a front opening groove upper groove edge 111, a front opening groove side edge, and a front opening groove lower groove edge 112 connected in sequence, and the rear opening groove includes a rear opening groove upper groove edge 211, a rear opening groove side edge, and a rear opening groove lower groove edge 212 connected in sequence. The V-shaped clamping block is provided with a rear opening groove upper groove edge 211, a front opening groove upper groove edge 111, a rear opening groove lower groove edge 212, and a front opening groove lower groove edge 112 in sequence from top to bottom.

[0025] The first inclined surface 10 is located on the upper groove edge 111 of the front opening groove, and the second inclined surface 20 is located on the lower groove edge 212 of the rear opening groove. The orthographic projection of the cross section of the front opening groove includes an overlapping area and a lower non-overlapping area. The lower groove edge of the rear opening groove extends horizontally forward to form a lower insert 2121, which fits and matches the lower non-overlapping area. The orthographic projection of the cross section of the rear opening groove includes an upper filling area and an overlapping area. The upper groove edge 111 of the front opening groove extends horizontally backward to form an upper insert 1111, which fits and matches the upper filling area. This makes the first inclined surface 10 and the second inclined surface 20 partially or completely opposite, and the vertical orthographic projections of the first inclined surface and the second inclined surface partially or completely overlap, providing a more stable clamping effect.

[0026] Furthermore, the corners of both the upper and lower inserts are rounded.

[0027] One embodiment of a V-shaped clamping block has a front opening groove and a rear opening groove with cross-sections that are U-shaped grooves rotated 90 degrees, and the two straight arms of the U-shaped groove are opposite to each other. The first inclined surface and the second inclined surface are both located in the straight arm section of the U-shaped groove. The upper and lower inserts are both handle-shaped bodies with rounded ends, which are easy to CNC machine into shape.

[0028] A V-shaped clamping block has a positioning groove 121 on the back of the front clamping body 1 and a positioning block 22 on the rear clamping body 2 that fits into the positioning groove 121 to facilitate positioning during assembly.

[0029] A V-shaped clamping block has a front clamping body 1 and a rear clamping body 2 screwed together. The front clamping body 1 is provided with a positioning hole 123, and the rear clamping body 2 is provided with a positioning through hole 23 opposite to the positioning hole 123. The positioning bolt 41 passes through the positioning through hole 23 and is screwed to the positioning hole 123.

[0030] A rotor angle gauge includes the aforementioned V-shaped clamp; it also includes a positioning frame on which a digital display angle gauge 5 is fixed, the positioning frame having a sliding hole 6, the V-shaped clamp being slidably connected within the sliding hole 6, one end of the sliding hole 6 having a positioning angle 60, the included angle of the positioning angle 60 being a rounded corner, used to clamp the leading edge of the rotor blade, the opening of the V-shaped clamping cavity 3 being oriented towards the positioning angle; the sliding trajectory of the V-shaped clamp is parallel to the measuring surface of the digital display angle gauge.

[0031] Furthermore, the distance from the upper groove edge 211 of the rear opening groove to the lower groove edge 112 of the front opening groove is less than the width of the sliding hole 60. The back of the front clamp is also provided with a slider 12 of the same width as the sliding hole 60. The back of the slider 12 has the positioning hole 123 and the positioning groove 121. After the front clamp 1 passes through the sliding hole 60 from the front of the positioning frame, it is screwed to the rear clamp 2 located on the back of the positioning frame by the positioning bolt 41, so as to drive the V-shaped clamp block to slide along the length direction of the sliding hole.

[0032] Furthermore, the vertex of the V-shaped clamping angle and the vertex of the positioning angle are located at the same horizontal height, which is suitable for measuring the pitch angle of symmetrical airfoil blades.

[0033] A rotor angle gauge has two grooves 61 on the back of the positioning frame along the upper and lower edges of the sliding hole 60. The rear clamp 2 has a mounting hole 24 opposite to the groove 61. A spring 62 is fixed to one end of the groove 61 near the positioning angle 60. The other end of the spring 62 is fixedly connected to the mounting bolt 42 passing through the mounting hole 24. The elastic contraction direction of the spring is set parallel to the measuring surface of the digital display angle gauge.

[0034] The bottom surface of the positioning frame has two calibration planes 8 located on the same horizontal plane, and the calibration planes 8 are parallel to the measuring surface of the digital display angle instrument. The bottom surface of the positioning frame also has a positioning opening groove 7 with the opening facing downward. The bottom wall of the positioning opening groove 7 is higher than the horizontal plane where the calibration planes 8 are located. The positioning opening groove 7 is located between the two calibration planes 8 and is used to accommodate protrusions on the reference plane.

[0035] A rotor angle meter, when using the relative measurement method to obtain the blade pitch angle, first selects a reference plane. In outdoor environments, the top plane of the motor of the remote-controlled drone is often selected. At this time, the positioning slot is aligned with the motor screw on the top plane of the motor, so that the calibration plane and the top plane of the motor can be stably attached. On this reference plane, the digital display angle meter is zeroed, and then the blade is passed through the sliding hole, and the positioning angle and V-shaped clamp are respectively engaged with the leading edge and trailing edge of the blade. At this time, the value displayed on the digital display angle meter is the relative blade pitch angle.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A V-shaped clamping block, comprising a V-shaped clamping block formed by assembling a front clamping body and a rear clamping body, characterized in that, The front clamp has a first inclined surface that abuts against the upper surface of the rotor, and the rear clamp has a second inclined surface that abuts against the lower surface of the rotor. The vertical gap between the first and second inclined surfaces forms a V-shaped clamping cavity. The clamping angle of the V-shaped clamping cavity is non-rounded, and the opening of the V-shaped clamping cavity faces the side a.

2. A V-shaped clamping block according to claim 1, characterized in that: The front clamp and the rear clamp are respectively provided with a connected front opening groove and a rear opening groove. The cross-sectional orthographic projections of the front opening groove and the rear opening groove overlap, and the overlapping area forms a V-shaped clamping cavity. The openings of the front opening groove and the rear opening groove both face the side a, and the corners of the front opening groove and the rear opening groove are both rounded.

3. A V-shaped clamping block according to claim 2, characterized in that: The first inclined surface is located on the upper edge of the front opening groove, and the second inclined surface is located on the lower edge of the rear opening groove. The orthographic projection of the front opening groove includes an overlapping area and a lower non-overlapping area. The lower edge of the rear opening groove extends horizontally forward to form a lower insert, which fits and matches the lower non-overlapping area. The orthographic projection of the rear opening groove includes an upper filling area and an overlapping area. The upper edge of the front opening groove extends horizontally backward to form an upper insert, which fits and matches the upper filling area.

4. A V-shaped clamping block according to claim 1, characterized in that: The front clamp has a positioning groove on the back, and the rear clamp has a positioning block that fits into the positioning groove.

5. A V-shaped clamping block according to claim 1, characterized in that: The front clamp and the rear clamp are screwed together. The front clamp has a positioning hole, and the rear clamp has a positioning through hole opposite to the positioning hole. The positioning bolt passes through the positioning through hole and is screwed into the positioning hole.

6. A rotor angle meter, characterized in that: Includes the V-shaped clamp as described in any one of claims 1-5.

7. A rotor angle meter according to claim 6, characterized in that: It also includes a positioning frame with a digital angle meter fixed on it. The positioning frame has a sliding hole, and a V-shaped clamping block is slidably connected in the sliding hole. One end of the sliding hole has a positioning angle with a rounded corner. The opening of the V-shaped clamping cavity is set towards the positioning angle. The sliding trajectory of the V-shaped clamping block is parallel to the measuring surface of the digital angle meter.

8. A rotor angle meter according to claim 6, characterized in that: The bottom surface of the positioning frame has two calibration planes located on the same horizontal plane, which are parallel to the measuring surface of the digital display angle meter; the bottom surface of the positioning frame also has a positioning opening slot with the opening facing downwards, the bottom wall of the positioning opening slot is higher than the horizontal plane where the calibration plane is located, and the positioning opening slot is located between the two calibration planes.

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